breaking stress
ultimate stress
elastic limit
yield point
✅ The correct answer is option C.
Chemical Engineering MCQs
Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is
same
less
about 3 times
about 0.33 times
✅ The correct answer is option C.
High pressure fluid in a shell and tube heat exchanger should preferably be routed through the
tubes to avoid the expansion of high pressure shell construction.
shell side for smaller total pressure drop.
shell side, if the flow is counter-current and tube side if the flow is co-current.
shell side for large overall heat transfer co-efficient.
✅ The correct answer is option A.
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator
is economical in operation.
employs high velocity, high heat transfer rate and less heating surface requirement.
employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle.
both (b) & (c).
✅ The correct answer is option D.
Skirt support is the most suitable for supporting __________ vessels.
small horizontal
large horizontal
tall vertical
thick walled
✅ The correct answer is option C.
Pick out the wrong statement:
The tensile strength of a brittle material is less than its compressive strength.
The compressive strength of a ductile materia] is less than its tensile strength.
In a thick cylindrical shell, the hoop stress is maximum at the inner radius.
The value of crushing load is more than that of buckling load for long colmns.
✅ The correct answer is option D.
Hold up of material in a operating rotary drier is in the range of
0.05 to 0.15
0.25 to 0.50
0.5 to 0.8
0.8 to 0.9
✅ The correct answer is option A.
LMTD correction factor is used in heat exchanger design for
double pipe heat exchanger.
multipass shell and tube heat exchanger.
fouling fluids.
counter flow of hot and cold fluids.
✅ The correct answer is option B.
The value of fouling factor depends upon the
characteristic of process fluid.
velocity of process fluid containing suspended solids.
suspended solids in the fluid.
all (a), (b) and (c).
✅ The correct answer is option D.
Pick out the wrong statement pertaining to the design of a horizontal tube evaporator.
It is unsuitable for concentrating those liquids, which form a scale or deposit salt.
It is suitable for process, in which the final product is a liquor instead of solid.
Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres.
Liquor flows inside the tube, while the steam is outside submerging the tube.
✅ The correct answer is option D.